And when I say history, I mean go all the way back, as far as you can remember.
For instance, the earliest career ambition I had (4 or 5 yo) was to become a carpenter or woodworker. At 7-8 I wanted to drive a semi. At 10 I clearly recall wanting to be a “trivia expert”, which I suppose would entail earning a living through regular appearances on TV game shows.
By age 12, I had a somewhat more realistic viewpoint and became interested in aeronautical engineering. In high school, I decided that airplanes were too crude (this was around the time of the first wave of personal computers ~1980), so I decided I wanted to be a computer programmer or designer. Then, in a temporary period of disenchantment with practicality, I decided to become a theoretical physicist.
In college, I veered back into the world of the practical and changed my major from physics to mechanical engineering after a couple of years. Spent a few years working in the automotive industry, then went to graduate school with the intention of becoming a professor of engineering. After finishing my doctorate, I found that the schools I wanted teach at did not want to hire me, and the schools that wanted to hire me, I did not want to teach at. So I took my degree back to industry and became an aerospace engineer. I guess I have fulfilled my age-12 ambition, but at this point, the “gentleman farmer” lifestyle is starting to look appealing.
I’m omitting most of the details of what was behind each change in direction to save space, but feel free to share your thoughts.